EP0854452B1 - Appareil pour détecter des feuilles superimposées - Google Patents

Appareil pour détecter des feuilles superimposées Download PDF

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Publication number
EP0854452B1
EP0854452B1 EP97309863A EP97309863A EP0854452B1 EP 0854452 B1 EP0854452 B1 EP 0854452B1 EP 97309863 A EP97309863 A EP 97309863A EP 97309863 A EP97309863 A EP 97309863A EP 0854452 B1 EP0854452 B1 EP 0854452B1
Authority
EP
European Patent Office
Prior art keywords
output
sensing station
optical sensor
item
amplifier
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP97309863A
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German (de)
English (en)
Other versions
EP0854452A2 (fr
EP0854452A3 (fr
Inventor
David L. Milne
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NCR International Inc
Original Assignee
NCR International Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by NCR International Inc filed Critical NCR International Inc
Publication of EP0854452A2 publication Critical patent/EP0854452A2/fr
Publication of EP0854452A3 publication Critical patent/EP0854452A3/fr
Application granted granted Critical
Publication of EP0854452B1 publication Critical patent/EP0854452B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07D—HANDLING OF COINS OR VALUABLE PAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING, DISPENSING, CHANGING OR DEPOSITING
    • G07D11/00—Devices accepting coins; Devices accepting, dispensing, sorting or counting valuable papers
    • G07D11/10—Mechanical details
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07D—HANDLING OF COINS OR VALUABLE PAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING, DISPENSING, CHANGING OR DEPOSITING
    • G07D7/00—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency
    • G07D7/06—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency using wave or particle radiation
    • G07D7/12—Visible light, infrared or ultraviolet radiation
    • G07D7/121—Apparatus characterised by sensor details
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07D—HANDLING OF COINS OR VALUABLE PAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING, DISPENSING, CHANGING OR DEPOSITING
    • G07D7/00—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency
    • G07D7/181—Testing mechanical properties or condition, e.g. wear or tear
    • G07D7/183—Detecting folds or doubles

Definitions

  • This invention relates to an apparatus for detecting the passage of multiple superposed sheets along a feed path.
  • the invention has application, for example, to an apparatus for detecting the passage of superposed currency notes in an automated teller machine (ATM).
  • ATM automated teller machine
  • a known system for detecting multiple sheets includes a sensing station in a feed path for the sheets.
  • the sensing station includes a light emitter and an optical sensor arranged to sense light from the emitter transmitted through an item comprising a single or multiple sheet present at the sensing station.
  • the optical sensor provides an output voltage whose magnitude is dependent on the intensity of the transmitted light received by the optical sensor.
  • the output voltage of the optical sensors is applied to a processing circuit, and on the basis of this voltage the processing circuit provides an output indicative of whether a single sheet or a multiple sheet is present at the sensing station.
  • the output of the sensor when no note is present at the sensing station is 5 volts
  • the output of the sensor with one note present would typically be 1 volt and the output with 2 notes present would typically be 0.2 volt.
  • A/D analog to digital
  • Another known system for detecting multiple sheets is disclosed, for example, in EP-B-0344938.
  • This system includes first and second co-operating rollers between which sheets pass as they are fed along a feed path, the first roller having a fixed axis of rotation, and the second roller being resiliently urged towards the first roller so as to enable it to be moved away from the first roller as a single or multiple sheet passes between the rollers.
  • a voltage generating means associated with the second roller produces an output voltage which varies linearly with movement of the second roller towards or away from the first roller, and this output voltage is applied to a processing circuit which determines whether a single or multiple sheet has passed between the rollers.
  • This known system has the disadvantage that it is relatively complicated compared with the known multiple sheet detector system using an optical sensor.
  • US-A-4 154 437 discloses a system for detecting multiple bills by continuously gauging the bill thickness and time averaging the bill thickness over the entire bill length.
  • US-A-4 513 439 discloses a security validator including a plurality of sensors. One of the sensors is used to measure the density of a sheet and includes an output ratioed with a fixed voltage.
  • a system for detecting the passage of multiple superposed sheets along a feed path including a sensing station through which said feed path passes and which has a light emitter and an optical sensor arranged to sense light from said light emitter transmitted through an item comprising a single or multiple sheet present at said sensing station, said optical sensor providing a voltage output whose magnitude is dependent on the intensity of the transmitted light received by said optical sensor, characterized by a log ratio amplifier having first and second inputs and an output, the output of said optical sensor being applied to said first input, and a voltage representative of the output of said optical sensor when no item is present at said sensing station being applied to said second input where said voltage is refreshed at the commencement of each transaction; and data processing means to which the output of said amplifier is applied, said data processing means being arranged to make a determination as to whether a single or multiple item is present at said sensing station on the basis of the output of said amplifier.
  • log ratio amplifier an operational amplifier circuit having two inputs and an output, and the output voltage of which is proportional to the log of the ratio of input voltages respectively applied to the two inputs.
  • the output of the log ratio amplifier varies linearly in dependence on whether no, one or two sheets are present at the sensing station.
  • the processing means makes a determination as to whether the multiple sheet comprises 2 sheets or 3 sheets.
  • the multiple note detecting means includes an optical system 10 provided at a sensing station 12 included in a cash dispensing mechanism 14 of an ATM.
  • the cash dispensing mechanism 14 includes a currency cassette 16 arranged to contain a stack of currency notes 18 of the same pre-determined denomination supported on their long edges.
  • the cassette 16 is associated with a pick mechanism 20.
  • the pick mechanism 20 draws out notes one by one from the stack 18, and each note is fed by feed rolls 22, 24, 26 via guide means 28 to feed rolls 30.
  • the direction of feed of the notes is at right angles to their long dimensions.
  • the cash dispensing mechanism 14 could include more than one cassette each associated with a pick mechanism, but in the present embodiment only one cassette and pick mechanism will be described.
  • Each picked note is passed through the sensing station 12 by the feed rolls 30 and by further feed rolls 32. If a multiple note is detected by the optical system 10 (in a manner to be described in more detail later) then a divert gate 34 diverts the multiple note via rolls 36 into a reject bin 38.
  • the stacking wheel 40 comprises a plurality of stacking plates 42 spaced apart in parallel relationship along the shaft 44 of the stacking wheel 40.
  • the belt means 46 transports the notes to a cash delivery slot (not shown).
  • the optical system 10 comprises an LED 48 as light emitter and an optical sensor 50 in the form of a photo-transistor 50.
  • a data processing means 52 controls the voltage output to the emitter 48 by means of a digital to analog (D/A) converter 54 in association with a suitable emitter voltage control circuit 56.
  • the optical sensor 50 is arranged to receive light directly from the emitter 48 if no note is present at the sensing station 12, or light from the emitter 48 transmitted through a single or multiple note 18' present at the sensing station 12.
  • the output voltage of the sensor 50 is dependent on the intensity of the light from the emitter 48 incident on the sensor 50. This output voltage is applied to a first input 58 of a log ratio amplifier 60 and to a peak voltage capacitive storage means 62.
  • the storage means 62 includes a capacitor (not shown) which temporarily stores a voltage corresponding to the peak output of the sensor 50, and this stored peak voltage is applied to the second input 64 of the amplifier 60.
  • the output of the amplifier 60 is connected to the data processing system 52 via an A/D converter 66.
  • the peak voltage stored in the storage means 62 corresponds to the output of the optical sensor 50 when no note is present at the sensing station 12, i.e. when the intensity of the light received by the sensor is at a maximum.
  • the stored voltage serves as a reference voltage as far as the operation of the log ratio amplifier 60 is concerned.
  • the voltage stored in the storage means 62 tends to decay, at the commencement of each transaction involving the cash dispensing mechanism 14 the emitter 48 is switched on thereby causing the optical sensor 50 to produce its maximum output voltage.
  • This maximum output voltage serves to refresh the voltage stored in the storage means 62 thereby restoring this last mentioned voltage to its peak value.
  • a reference voltage corresponding to the peak output of the sensor 50 will be applied to the input 64 of the amplifier 60.
  • Vout A.log Vref/Vinput
  • the output of the log ratio amplifier 60 is proportional to the number of notes present at the sensing station 12.
  • the value of "A" is chosen so that for a reference voltage of 5 volts the output from the log ratio amplifier 60 is 1 volt for one note present at the sensing station 12, 2 volts for two notes present at the sensing station 12, 3 volts for three notes present at the sensing station 12, and so on. When no note is present at the sensing station 12 the output of the amplifier 60 will be zero.
  • the output voltage of the sensor 50 falls because the light reaching it is now passing through the single or multiple note, thereby causing the output voltage from the amplifier 60 to rise to at least 1 volt.
  • the output of the log ratio amplifier 60 is fed to the A/D converter 66 which causes a digital representation of this output to be stored in a memory location 68 in the data processing means 52.
  • the timing of these readings is determined by timing pulses generated by a sensor 70 associated with a timing disc 72 attached to one of the transport rollers 30, the sensor 70 being connected to the data processing means 52.
  • the reading and storing stops when the output voltage of the log ratio amplifier 60 falls back to 0 volts (i.e. when the single or multiple note leaves the optical system 10).
  • the data processing means 52 then totals the stored digital representations of the sampled outputs of the log ratio amplifier 60 while the single or multiple note is passing through the sensing station 12 so as to produce a summation value representative of the average thickness of the note across its width. It will be appreciated that this summation procedure averages out darker or lighter areas or soiled areas.
  • the data processing means 52 compares the summation value with the contents of a look-up table held in a memory location 74 of the data processing means 52 in order to determine, if possible, the number of notes which just passed through the sensing.
  • the contents of the look-up table in the memory up table in the memory location 74 comprise three discrete ranges of values respectively corresponding to 1, 2 and 3 notes.
  • the pick mechanism 20 picks a single currency note from the currency cassette 16 for feeding to the stacking wheel 40 (see Fig. 1).
  • the divert gate 34 remains in its home position as shown in solid outline in Fig.1, thereby enabling the note to be fed to the stacking wheel 40 for stacking on the belt means 46 and transportation to the cash delivery slot.
  • the number of notes detected is stored in a memory location 76 in the data processing means 52. These stored numbers can be used for reconciliation purposes when the reject bin 38 (see Fig. 1) is emptied.
  • the data processing means 52 also controls the position of the divert gate 34 by means of a solenoid 78 and connecting means 80. Thus, if a multiple note is detected, then the data processing means 52 moves the gate 34 into its activated position shown in chain outline in Fig.1 so that the multiple note is diverted into the reject bin 38.
  • the preferred embodiment shows notes of the same pre-determined denomination in a single cassette, it can be applied to a cash dispensing mechanism involving a plurality of denominations.
  • Different types of currency notes would give rise to different summation values representative of the average thickness of the notes taken across their width.
  • the currency types could be given appropriate ranges in the look-up table held in memory location 74 of the data processing means 52, so that the multiple note detect system can deal with notes of different denominations.
  • the system described above can reliably distinguish between single and multiple notes. Also, the system can reliably distinguish for example between double and triple notes, which is of help in connection with reconciliation procedures. The inherent reliability of this system is sufficiently good that the system can be used in place of more complicated and expensive multiple sheet detect systems such as those incorporating co-operating rollers.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Controlling Sheets Or Webs (AREA)
  • Inspection Of Paper Currency And Valuable Securities (AREA)
  • Financial Or Insurance-Related Operations Such As Payment And Settlement (AREA)

Claims (9)

  1. Système destiné à détecter le passage de feuilles superposées multiples, le long d'un trajet d'alimentation, le système comprenant un poste de détection (12), à travers lequel le trajet d'alimentation passe et qui comporte un émetteur de lumière (48) et un capteur optique (50), conçu pour détecter de la lumière provenant de l'émetteur de lumière, émise à travers un élément comprenant une feuille simple ou multiple, présent au poste de détection, le capteur optique (50) délivrant une sortie en tension dont l'amplitude est fonction de l'intensité de la lumière émise, reçue par le capteur optique, caractérisé par un amplificateur logarithmique de rapport (60) comprenant des première et deuxième entrées (58, 64), et une sortie, la sortie du capteur optique (50) étant appliquée à la première entrée (58) et une tension représentative de la sortie du capteur optique, lorsque aucun élément n'est présent au poste de détection (10) étant appliquée à la deuxième entrée (64), où la tension est régénérée au commencement de chaque transaction ; et un moyen de traitement de données (52) auquel la sortie de l'amplificateur (60) est appliquée, le moyen de traitement de données étant conçu pour déterminer si un élément simple ou multiple est présent au poste de détection, sur la base de la sortie de l'amplificateur.
  2. Système suivant la revendication 1, caractérisé en ce que la sortie de l'amplificateur logarithmique de rapport (60) se modifie de façon linéaire par rapport au nombre de feuilles présentes au poste de détection (12).
  3. Système suivant la revendication 1 et la revendication 2, caractérisé en ce que l'émetteur (48) est une diode lumineuse ; et en ce que le capteur optique (50) est un phototransistor.
  4. Système suivant l'une quelconque des revendications précédentes, caractérisé en ce que la sortie du capteur optique (50) est connectée à un moyen de mémorisation par capacité de tension de crête (62), destiné à mémoriser la sortie de crête du capteur optique, la tension de crête mémorisée dans le moyen de mémorisation étant appliquée à la deuxième entrée (64) de l'amplificateur logarithmique de rapport (60).
  5. Système suivant l'une quelconque des revendications précédentes, caractérisé en ce que le moyen de traitement de données (52) est conçu pour accomplir les étapes consistant à a) détecter la sortie de l'amplificateur logarithmique de rapport (60) à intervalles réguliers, tandis que l'élément est entraíné à travers le poste de détection (12) ; b) mémoriser des valeurs numériques représentatives des sorties échantillonnées de l'amplificateur ; c) générer une valeur de sommation représentant la somme des valeurs mémorisées ; et d) utiliser la valeur de sommation pour déterminer si l'élément comprend une feuille simple ou multiple.
  6. Système suivant la revendication 5, caractérisé en ce qu'à l'étape d) le moyen de traitement de données (52) compare la valeur de sommation à des plages mémorisées de valeurs correspondant respectivement à une, deux et trois feuilles présentes au poste de détection (12).
  7. Système suivant la revendication 6, caractérisé en ce que si la valeur de sommation concorde avec l'une des plages mémorisées de valeurs correspondant respectivement à deux et trois feuilles présentes au poste de détection (12), le moyen de traitement de données (52) est conçu pour mémoriser un enregistrement du nombre de feuilles composant l'élément détecté.
  8. Système suivant l'une quelconque des revendications 5 à 7, caractérisé par des moyens de cadencement (70, 72) destinés à générer des impulsions de cadencement, en synchronisme avec la rotation des moyens d'alimentation rotatifs (30) destinés à entraíner des feuilles à travers le poste de détection (12).
  9. Mécanisme de distribution de billets (14) comprenant un système suivant l'une quelconque des revendications précédentes, le mécanisme comprenant un mécanisme de préhension (20) destiné à saisir des billets de banque à partir d'un bac de stockage (16), et des moyens d'alimentation (par exemple, 30) destinés à entraíner des billets saisis à travers le système via le moyen de déviation (34) vers le moyen d'empilage (40) pour former les billets saisis en une pile, le moyen de déviation étant conçu pour faire dévier un élément saisi vers une case rebut (38) dans l'éventualité où le système détermine que l'élément saisi est un billet multiple.
EP97309863A 1996-12-24 1997-12-08 Appareil pour détecter des feuilles superimposées Expired - Lifetime EP0854452B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB9626848.7A GB9626848D0 (en) 1996-12-24 1996-12-24 System for detecting multiple superposed sheets
GB9626848 1996-12-24

Publications (3)

Publication Number Publication Date
EP0854452A2 EP0854452A2 (fr) 1998-07-22
EP0854452A3 EP0854452A3 (fr) 2000-05-24
EP0854452B1 true EP0854452B1 (fr) 2003-07-09

Family

ID=10805000

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97309863A Expired - Lifetime EP0854452B1 (fr) 1996-12-24 1997-12-08 Appareil pour détecter des feuilles superimposées

Country Status (7)

Country Link
US (2) US5965865A (fr)
EP (1) EP0854452B1 (fr)
JP (1) JPH10291691A (fr)
DE (1) DE69723414T2 (fr)
ES (1) ES2202561T3 (fr)
GB (1) GB9626848D0 (fr)
ZA (1) ZA9711130B (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4111429A4 (fr) * 2020-02-26 2023-12-27 Shenzhen Xpectvision Technology Co., Ltd. Machines de comptage de devises

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US6241244B1 (en) * 1997-11-28 2001-06-05 Diebold, Incorporated Document sensor for currency recycling automated banking machine
US6354584B1 (en) 1998-10-14 2002-03-12 Canon Kabushiki Kaisha Sheet feeding apparatus, image forming apparatus having the same and image reading apparatus having the same
JP4465140B2 (ja) 1999-11-25 2010-05-19 富士通株式会社 紙葉類処理装置
US6364556B1 (en) * 1999-12-22 2002-04-02 Hewlett-Packard Company Method and apparatus for print media detection
US20050098622A1 (en) * 2001-10-09 2005-05-12 Gregory Jantsch Dispensing of currency
US7387236B2 (en) * 2001-10-09 2008-06-17 Delaware Capital Formation, Inc. Dispensing of currency
DE50205040D1 (de) * 2002-09-26 2005-12-29 Leuze Electronic Gmbh & Co Kg Verfahren zum Betrieb eines Sensors zur Erfassung von Bögen in einer bogenverarbeitenden Maschine
US7018121B2 (en) * 2004-03-11 2006-03-28 Lexmark International, Inc. Combined paper and transparency sensor for an image forming apparatus
US20070001383A1 (en) * 2005-06-20 2007-01-04 Gregory Jantsch Dispensing of currency
JP4732274B2 (ja) * 2006-08-18 2011-07-27 株式会社リコー 媒体搬送装置、画像形成装置
CN102456246B (zh) * 2010-10-19 2014-04-30 山东新北洋信息技术股份有限公司 纸币重张的检测方法及装置、自助终端
US8727336B2 (en) * 2011-10-31 2014-05-20 Ncr Corporation Condition determining

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US4352559A (en) * 1976-11-10 1982-10-05 Ardac, Inc. Logarithmic primary testing system for security validation
US4154437A (en) * 1977-07-15 1979-05-15 Diebold, Incorporated Multiple bill detector for currency dispensers
GB2108935B (en) * 1981-11-10 1985-06-12 Ncr Co Sheet handling apparatus
US4513439A (en) * 1982-07-12 1985-04-23 Ardac, Inc. Security validator
US4577763A (en) * 1984-03-28 1986-03-25 Ncr Corporation Cash dispensing system
GB2205649B (en) * 1987-06-12 1991-04-24 Ncr Co Apparatus for detecting the passage of multiple superposed sheets along a feed path
GB8807631D0 (en) * 1988-03-30 1988-05-05 Ncr Co Apparatus for detecting passage of multiple superposed sheets along feed path
GB8813025D0 (en) * 1988-06-02 1988-07-06 Ncr Co Apparatus for detecting passage of multiple superposed sheets along feed path

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4111429A4 (fr) * 2020-02-26 2023-12-27 Shenzhen Xpectvision Technology Co., Ltd. Machines de comptage de devises

Also Published As

Publication number Publication date
US5965865A (en) 1999-10-12
DE69723414D1 (de) 2003-08-14
ZA9711130B (en) 1999-06-10
US6237847B1 (en) 2001-05-29
DE69723414T2 (de) 2004-04-15
EP0854452A2 (fr) 1998-07-22
GB9626848D0 (en) 1997-02-12
JPH10291691A (ja) 1998-11-04
ES2202561T3 (es) 2004-04-01
EP0854452A3 (fr) 2000-05-24

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